Magnetic Exchange Interactions in the Linear Chain Chromium (III) Compounds Catena-Fluorophthalocyaninato chromium (III) and Catena-Cyanophthalocyaninato chromium (III).
Abstract
Magnetic susceptibility and magnetization studies on the linear chain chromium(III) compounds catena-fluorophthalocyaninatochromium(III), CrPcF n, and catena-cyanophthalocyaninatochromium (III), CrPcCNn, reveal that the chromium (III) ions in CrPcFn and CrPcCNn are magnetically exchange coupled. The magnetic susceptibility data for CrPcFn may be fit with Heisenberg linear chain theory for antiferromagnetic exchange with J = -12.2/cm and g = 2.00. The magnetic susceptiblity data for CrPcCNn may be fit with Heisenberg linear chain theory for ferromagnetic exchange with J = 0.2/cm and g = 1.98. CrPcCNn provides the first example of ferromagnetic exchange in a linear chain of chromium (III) ions. The difference in the exchange interactions in CrPcFn and CrPcCNn may be understood in terms of the electronegativities of the bridges and in terms of the orbitals which transmit the superexchange interactions. Originator supplied keywords include: Electrical conductivity (phthalocyanine); Low-dimensional conducting materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1985
- Accession Number
- ADA157861
Entities
People
- A. Datz
- M. D. Joesten
- M. Hanack
- M. Schwartz
- W. E. Hatfield
Organizations
- University of North Carolina at Chapel Hill